134 research outputs found

    Energy, sustainability and communities : assessing the potential for community energy planning in British Columbia

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    Analysis of the demand for energy services has traditionally focused on efficiency improvements to buildings and equipment. Yet, energy consumption patterns are also influenced by urban infrastructure characteristics which are largely under the control of municipal government.Community energy planning (CEP) is an integrative process that aims to jointly address energy,sustainability and community planning objectives. It is currently in its infancy as a planningprocess. To move from the realm of concept to that of practice , it is necessary to answer three questions: what is CEP? ; why should we do it?; and how do we do it?This study develops the concept of CEP into four policy packages designed to influence urban land use planning, transportation management, site and building design, and the use of alternative energy supplies . The " why" ofCEP must be answered at two levels: at the community level in order to motivate local action; and at a more aggregate level in order to motivate major policy shifts. In this study, the benefits to communities are demonstrated through a series of four casestudies which compare two alternative scenarios of development over a fifteen year time frame.Demonstrating the benefits at a more aggregate level is difficult , given the diversity of communities . By focusing on a single component of CEP, namely urban land use planning, it was possible to develop a heuristic for illustrating the benefits of CEP at the provincial level. The "how" of CEP is also examined at two levels: a conceptual level , to identify major legal, technical, economic and social issues ; and a practical level, to develop, through a case study, an understanding of some real-world problems and solutions . As CEP requires the involvement of municipal government in an area-not traditionally considered municipal jurisdiction, the specificlegal authority for municipal action with respect to CEP is examined.The results of the study analyses suggest that communities can achieve energy and cost savings of 15 to 30% and energy-related emission reductions of 30 to 45%. Investments in the energy sector tend to produce two to three times more jobs in the local economy in a CEP approach versus a business-as-usual approach. At an aggregate level, land use planning reform alone is estimated to produce carbon dioxide emission reductions of 17% at cost savings of 20%. Savings per tonne ofabatement are in excess of $600 . These results are relatively insensitive to substantial changes in the underlying assumptions, suggesting that uncertainty is not a significant factor in interpreting the results . The study suggests that the greatest benefits will be realized by bringing very low density urban areas up to more moderate densities through selective redevelopment.The implications of these results for municipalities and regions , the province , and the energy utilities are presented, along with suggestions for further study

    The Relationship between Brachycephalic Head Features in Modern Persian Cats and Dysmorphologies of the Skull and Internal Hydrocephalus

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    Background: Cat breeders observed a frequent occurrence of internal hydrocephalus in Persian cats with extreme brachycephalic head morphology. Objective: To investigate a possible relationship among the grade of brachycephaly, ventricular dilatation, and skull dysmorphologies in Persian cats. Animals: 92 Persian-, 10 Domestic shorthair cats. Methods: The grade of brachycephaly was determined on skull models based on CT datasets. Cranial measurements were examined with regard to a possible correlation with relative ventricular volume, and cranial capacity. Persians with high (peke-face Persians) and lower grades of brachycephaly (doll-face Persians) were investigated for the presence of skull dysmorphologies. Results: The mean cranial index of the peke-face Persians (0.97 ± 0.14) was significantly higher than the mean cranial index of doll-face Persians (0.66 ± 0.04; P < 0.001). Peke-face Persians had a lower relative nasal bone length (0.15 ± 0.04) compared to doll-face (0.29 ± 0.08; P < 0.001). The endocranial volume was significantly lower in doll-face than peke-face Persians (89.6 ± 1.27% versus 91.76 ± 2.07%; P < 0.001). The cranial index was significantly correlated with this variable (SpearmanŽs r: 0.7; P < 0.0001). Mean ventricle: Brain ratio of the peke-face group (0.159 ± 0.14) was significantly higher compared to doll-face Persians (0.015 ± 0.01; P < 0.001). Conclusion and Clinical Relevance: High grades of brachycephaly are also associated with malformations of the calvarial and facial bones as well as dental malformations. As these dysmorphologies can affect animal welfare, the selection for extreme forms of brachycephaly in Persian cats should be reconsidered

    Expanding STEM Membership: Using Science Process Skills in a Social Justice Curriculum to Combat Stereotype Threats and Build Self-Efficacy in African American Students

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    Science process skills were scaffolded throughout instruction over the ten-week program. The culminating project included the development, design, and testing of their own independent science fair project. The results reflect an increase in students’ self-efficacy which was evidenced by the students’ preparation and presentation of their projects in the science fair

    Treponema Infection Associated With Genital Ulceration in Wild Baboons

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    The authors describe genital alterations and detailed histologic findings in baboons naturally infected with Treponema pallidum. The disease causes moderate to severe genital ulcerations in a population of olive baboons (Papio hamadryas anubis) at Lake Manyara National Park in Tanzania. In a field survey in 2007, 63 individuals of all age classes, both sexes, and different grades of infection were chemically immobilized and sampled. Histology and molecular biological tests were used to detect and identify the organism responsible: a strain similar to T pallidum ssp pertenue, the cause of yaws in humans. Although treponemal infections are not a new phenomenon in nonhuman primates, the infection described here appears to be strictly associated with the anogenital region and results in tissue alterations matching those found in human syphilis infections (caused by T pallidum ssp pallidum), despite the causative pathogen’s greater genetic similarity to human yaws-causing strains

    Revealing Dissociable Attention Biases in Chronic Smokers Through an Individual-Differences Approach

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    Addiction is accompanied by attentional biases (AB), wherein drug-related cues grab attention independently of their perceptual salience. AB have emerged in different flavours depending on the experimental approach, and their clinical relevance is still debated. In chronic smokers we sought evidence for dissociable attention abnormalities that may play distinct roles in the clinical manifestations of the disorder. Fifty smokers performed a modified visual probe-task measuring two forms of AB and their temporal dynamics, and data on their personality traits and smoking history/ status were collected. Two fully dissociable AB effects were found: A Global effect, reflecting the overall impact of smoke cues on attention, and a Location-specific effect, indexing the impact of smoke cues on visuospatial orienting. Importantly, the two effects could be neatly separated from one another as they: (i) unfolded with dissimilar temporal dynamics, (ii) were accounted for by different sets of predictors associated with personality traits and smoking history and (iii) were not correlated with one another. Importantly, the relevance of each of these two components in the single individual depends on a complex blend of personality traits and smoking habits, a result that future efforts addressing the clinical relevance of addiction-related AB should take into careful consideration.This study was supported by funding provided by the University of Verona to CDL, CC and L

    Student politics, teaching politics, black politics: an interview with Ansel Wong

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    Ansel Wong is the quiet man of British black politics, rarely in the limelight and never seeking political office. And yet his ‘career’ here – from Black Power firebrand to managing a multimillion budget as head of the Greater London Council’s Ethnic Minority Unit in the 1980s – spells out some of the most important developments in black educational and cultural projects. In this interview, he discusses his identification with Pan-Africanism, his involvement in student politics, his role in the establishment of youth projects and supplementary schools in the late 1960s and 1970s, and his involvement in black radical politics in London in the same period, all of which took place against the background of revolutionary ferment in the Third World and the world of ideas, and were not without their own internal class and ethnic conflicts

    Reward can modulate attentional capture, independent of top-down set

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    © 2015, The Author(s). The traditional distinction between exogenous and endogenous attentional control has recently been enriched with an additional mode of control, termed “selection history.” Recent findings have indicated, for instance, that previously rewarded or punished stimuli capture more attention than their physical attributes would predict. As such, the value that is associated with certain stimuli modulates attentional capture. This particular influence has also been shown for endogenous attention. Although recent leads have emerged, elucidating the influences of reward on exogenous and endogenous attention, it remains unclear to what extent exogenous attention is modulated by reward when endogenous attention is already deployed. We used a Posner cueing task in which exogenous and endogenous cues were presented to guide attention. Crucially, the exogenous cue also indicated the reward value. That is, the color of the exogenous cue indicated how much reward could be obtained on a given trial. The results showed main effects of endogenous and exogenous attention (i.e., speeded reaction times when either cue was valid, as compared to when it was invalid). Crucially, an interaction between exogenous cue validity and reward level was observed, indicating that reward-based associative-learning processes rapidly influence attentional capture, even when endogenous attention has been actively deployed.This research was supported by an ERC advanced grant (No. ERC-2012-AdG-323413 to J.T.)

    Using qualitative and quantitative methods to choose a habitat quality metric for air pollution policy evaluation

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    Atmospheric nitrogen (N) deposition has had detrimental effects on species composition in a range of sensitive habitats, although N deposition can also increase agricultural productivity and carbon storage, and favours a few species considered of importance for conservation. Conservation targets are multiple, and increasingly incorporate services derived from nature as well as concepts of intrinsic value. Priorities vary. How then should changes in a set of species caused by drivers such as N deposition be assessed? We used a novel combination of qualitative semi-structured interviews and quantitative ranking to elucidate the views of conservation professionals specialising in grasslands, heathlands and mires. Although conservation management goals are varied, terrestrial habitat quality is mainly assessed by these specialists on the basis of plant species, since these are readily observed. The presence and abundance of plant species that are scarce, or have important functional roles, emerged as important criteria for judging overall habitat quality. However, species defined as ‘positive indicator-species’ (not particularly scarce, but distinctive for the habitat) were considered particularly important. Scarce species are by definition not always found, and the presence of functionally important species is not a sufficient indicator of site quality. Habitat quality as assessed by the key informants was rank-correlated with the number of positive indicator-species present at a site for seven of the nine habitat classes assessed. Other metrics such as species-richness or a metric of scarcity were inconsistently or not correlated with the specialists’ assessments. We recommend that metrics of habitat quality used to assess N pollution impacts are based on the occurrence of, or habitat-suitability for, distinctive species. Metrics of this type are likely to be widely applicable for assessing habitat change in response to different drivers. The novel combined qualitative and quantitative approach taken to elucidate the priorities of conservation professionals could be usefully applied in other contexts
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